Краткое пояснение:
Для построения предложений в данном упражнении используется конструкция Past Continuous (was/were + V-ing) для обозначения действия в процессе, и Past Simple для обозначения внезапного действия, которое прервало первое.
Пошаговое решение:
- Dan (fall) ............... off the tree while he (rescue) ............... the cat. → Dan was falling off the tree while he was rescuing the cat.
- read) ............... in the bed when suddenly I (hear) ............... a voice downstairs → I was reading in the bed when suddenly I heard a voice downstairs.
- (you/have) ............... a bath when I phoned you? → (you/have) were having a bath when I phoned you?
- They (wait) ............... for a ............... → They were waiting for a taxi when I (arrive) ............... .
- I (not/drive) ............... very fast when ............... (see) her. → I was not driving very fast when I (see) saw her.
- Bob (take) ............... a nap while I (paint) ............... → Bob was taking a nap while I was painting.